linux-kernel - [mhiramat:topic/fprobe-on-fgraph] [function_graph] f2ed0fd5cc: WARNING:at_kernel/trace/trace.c:#run_tracer

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Message-ID: <202401172200.c8731564-oliver.sang@intel.com>
Date: Wed, 17 Jan 2024 22:59:23 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Masami Hiramatsu <mhiramat@...nel.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	<linux-trace-kernel@...r.kernel.org>, <oliver.sang@...el.com>
Subject: [mhiramat:topic/fprobe-on-fgraph] [function_graph] f2ed0fd5cc:
 WARNING:at_kernel/trace/trace.c:#run_tracer_selftest



Hello,

kernel test robot noticed "WARNING:at_kernel/trace/trace.c:#run_tracer_selftest" on:

commit: f2ed0fd5cc77ca2ad957569c35e76ef08cf93f54 ("function_graph: Add a new entry handler with parent_ip and ftrace_regs")
https://git.kernel.org/cgit/linux/kernel/git/mhiramat/linux.git topic/fprobe-on-fgraph

in testcase: boot

compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+------------------------------------------------------+------------+------------+
|                                                      | 2d3653c71e | f2ed0fd5cc |
+------------------------------------------------------+------------+------------+
| WARNING:at_kernel/trace/trace.c:#run_tracer_selftest | 0          | 20         |
| EIP:run_tracer_selftest                              | 0          | 20         |
+------------------------------------------------------+------------+------------+


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202401172200.c8731564-oliver.sang@intel.com



[    5.535374][    T1] Testing tracer function_graph: .. no entries found ..FAILED!
[    6.645598][    T1] ------------[ cut here ]------------
[    6.646006][    T1] WARNING: CPU: 0 PID: 1 at kernel/trace/trace.c:2045 run_tracer_selftest+0x256/0x26c
[    6.646759][    T1] Modules linked in:
[    6.647062][    T1] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G                T  6.7.0-rc8-00022-gf2ed0fd5cc77 #1
[    6.647669][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[    6.648455][    T1] EIP: run_tracer_selftest+0x256/0x26c
[    6.648871][    T1] Code: 00 00 66 90 8b 15 ec 97 d3 d4 b9 ff ff ff ff a1 28 98 d3 d4 e8 37 68 ff ff e9 26 fe ff ff c7 04 24 90 d6 8c d4 e8 92 68 f6 ff <0f> 0b b8 ff ff ff ff e9 a7 fe ff ff b8 f4 ff ff ff e9 9d fe ff ff
[    6.650343][    T1] EAX: 00000007 EBX: d4e33700 ECX: 00000000 EDX: 00000000
[    6.650884][    T1] ESI: d4e4a8c0 EDI: c101f100 EBP: c138de8c ESP: c138de78
[    6.651422][    T1] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010246
[    6.651661][    T1] CR0: 80050033 CR2: ffcb2000 CR3: 14f88000 CR4: 00040690
[    6.652189][    T1] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[    6.652715][    T1] DR6: fffe0ff0 DR7: 00000400
[    6.653063][    T1] Call Trace:
[    6.653309][    T1]  ? show_regs+0x82/0x90
[    6.653630][    T1]  ? run_tracer_selftest+0x256/0x26c
[    6.654025][    T1]  ? __warn+0x89/0x1bc
[    6.654333][    T1]  ? run_tracer_selftest+0x256/0x26c
[    6.654733][    T1]  ? run_tracer_selftest+0x256/0x26c
[    6.655128][    T1]  ? report_bug+0x1c5/0x23c
[    6.655467][    T1]  ? exc_overflow+0x58/0x58
[    6.655661][    T1]  ? handle_bug+0x28/0x50
[    6.655984][    T1]  ? exc_invalid_op+0x28/0x7c
[    6.656332][    T1]  ? preempt_count_sub+0xc9/0x120
[    6.656706][    T1]  ? preempt_count_add+0x69/0xc8
[    6.657074][    T1]  ? vprintk_emit+0x7a/0x194
[    6.657418][    T1]  ? handle_exception+0x14d/0x14d
[    6.657794][    T1]  ? exc_overflow+0x58/0x58
[    6.658130][    T1]  ? run_tracer_selftest+0x256/0x26c
[    6.658530][    T1]  ? exc_overflow+0x58/0x58
[    6.658865][    T1]  ? run_tracer_selftest+0x256/0x26c
[    6.659262][    T1]  register_tracer+0xe4/0x28c
[    6.659612][    T1]  ? register_trace_event+0xf6/0x180
[    6.659661][    T1]  ? init_graph_tracefs+0x3c/0x3c
[    6.660036][    T1]  init_graph_trace+0x56/0x7c
[    6.660386][    T1]  do_one_initcall+0x70/0x3b8
[    6.660732][    T1]  ? parameq+0x13/0x68
[    6.661039][    T1]  ? parse_args+0x202/0x37c
[    6.661383][    T1]  do_initcalls+0x100/0x228
[    6.661721][    T1]  ? rdinit_setup+0x40/0x40
[    6.662061][    T1]  ? rest_init+0x194/0x194
[    6.662393][    T1]  kernel_init_freeable+0xd3/0x1c4
[    6.662772][    T1]  kernel_init+0x1a/0x1dc
[    6.663096][    T1]  ? schedule_tail+0x60/0x78
[    6.663439][    T1]  ret_from_fork+0x3d/0x48
[    6.663661][    T1]  ? rest_init+0x194/0x194
[    6.663992][    T1]  ret_from_fork_asm+0x12/0x18
[    6.664348][    T1]  entry_INT80_32+0x10d/0x10d
[    6.664702][    T1] irq event stamp: 2172679
[    6.665030][    T1] hardirqs last  enabled at (2172687): [<d3cf0dfe>] console_unlock+0x11a/0x178
[    6.665694][    T1] hardirqs last disabled at (2172694): [<d3cf0de5>] console_unlock+0x101/0x178
[    6.666360][    T1] softirqs last  enabled at (2172316): [<d45fad83>] __do_softirq+0x2f3/0x4b4
[    6.667009][    T1] softirqs last disabled at (2172309): [<d3c17af3>] do_softirq_own_stack+0x37/0x4c
[    6.667661][    T1] ---[ end trace 0000000000000000 ]---



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240117/202401172200.c8731564-oliver.sang@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki